Road grader



Jan.. 19, 1932. A G E, DEAN 1,841,403

4 I ROAD GRADER Filed Jan. 9, 1931 2 Sheets-Sheet Jan. 19, 1932. Q E DEAN 1,841,403

' ROAD GRADER Filed Jan. 9, 1951 2 Sheets-Sheet 2 Patented Jan. 179,` 1932 t UNITED STATES.

l GEORGE;l E. DEANQoF GrimmaY RAPIns-jirrcnrenngAssreivonTo cHAnLEQsG. urinnrmkr,y I i or GRAND RAPIDS, MICHIGAN l 'e nomi GRAnnn'fff i Y A Application meaA Januarya 1913i. "seriai N6. 507,552.

VThis invention pertains or relates to a i mechanism adapted to rotate a revolubly .Y

mounted member! through a predetermined arc and more particularly to an' adjusting turntable Vof a road scraper,

' `Road Scrapers are widely used 'for scrap# `'table'thereon. Y The turntable -has afcross.4

"beam rigid therewith and blades are pivotallyV mounted underneath-' this vcrossbeame- Hydraulic cylinders are supported' .by the beam andy linkage connects `the pistonsoperating. in these cylinders" with 'the pivoted blades whereby power operation ofthe blades is had; Control y of the cylinders is had"Y through a novel system of control as set forth in my -applicatio'n'led January 27 1931,- Se rial No. 506,152. g Y i Y The present invention deals with mechanism Y for rotating the'turn'tableof scrapers ofthe .30 class referred to and alsoY to means for automatically rendering the'rotating means in-v operative after a 'certain rpredetermined movement of the turntablehas 'taken place. v One of the'pr'incipal advantages of my 1n- T35 vention lies in the novel arrangement of parts Y whereby the turning'movementof theJ turn-v table is utilized yin the stopping ofthe-'prime movers which motivate the mechanism which "drives the turntable. 4' uw Vtion and utilizes the motors not only as prime when they are notenergizedl` instable A01* .longitudinal f Sliding Gross -bar whereby-f the :samejmay {beslightly shifted n endWisefin' orderv toch'ange thefdegree ofrene` 50' gagement between thef'teethf of the "pinion and 5 device adapted to be applied-tothe cire'lejor"V jvto limit it in anymanner. f c.

vAnother feature which I deem important i resides in thel double mounting. of rtheworm shaft. "This makes for asubstantial construe Y 'movers but also makesthem serve asbeari'ngsV Still another advantage resides injmy ad-f-BLHSYD- the toothed `segment'upondthe turntable;y Y, Moreoverthe slotted end construction'ofthis" bar allows it toberattached to VVparallel ,side members regardlessolfI their spacingi;Y fir: l *Other objects .of this invention will be set. forth in'V theg'following descriptionand draw` i i' ings Vwhichillustrate a preferred embodiv ment lof this invention,`. it :being 'understood that theabove general statement isV extended Y merely to generally explain thesamge andnot 1 Brieflydescribed, my inventionconsistsof sa crossbar located-adjacent tofthe turntable of ka 'road.scrape1'5`thisbar supportingtwo V 'alined motors thereon. p The motors-have "an y common shaftfeiitending throughv a housing d supported'therebetween and a worin is fixed Y f tothe common shaftinteriorly of thefhou'sing., lA vertical stubshaft is rnountedin the 1 fhousingan'd a worm wheel-thereon meshes withthesaid worm,r thus causing 'rotationfof the stubA shaftwhenever either'of the motors y -j is`driven.- A pin-ionxis mounted uponjthe stubfshaft exteriorly ofthe housing andi enn gages-av toothed segment v:upon the turntable-f75 whereby-the turntable-land 'is Vdxlipending vscraperbladesareroatedto'the'desiredposij tion. f The Amotors are* preferably identical f in construction whereby operation of onewill cause rotation oftheturntable ina direction opposite to that Vofgthefother.v The-motors are electricallyl drivenand la'icircuit .breakery Y is positioned" adjacent theyturntable whereby v Contact is made therewithitopreventexcessive movement oftheA turntablefi` i1 Fig. l is a pl n view of*theunderfcarrilage .of affukequippediwifhmyavenan-r1.

Fig. 2 is aside view* of the-K scraper yatta-cli-V Fig. 2., 'y

rig. ramal-view @returnable qiiippa fzwit-h my novely adjustingfY and `locking `Inec'h- "95; l

agian 'Va frenata@ as hasta OfFg.

Fiets an enlargdpl swinging;

deans', @fue ircaitbrakerj; f

Y Similar numerals refer toV similar parts through the severalviews.

Vleierring particularly to Figs. l and 2, 10Y indicates the side members of a truck equipped with my invention.' Y These side membersV support vertically adjustable brackets 11,1these-brackets supporting spaced arallel bars 12 which in turn carry adjustable shoes 13,Vv these shoes overlapping the` ,0"turntable 1'4and"revolublyfsupporting the same.

The turnabrle 14 carries a beam 15,'1from which blades 16 pivotally depend. `I-Iydra'uli'c means 17 are mountedfupon either sideof .the beam 15, this hydraulic mechanism, controlled :by the valvearran'gementlS, acting to move the 'blades16 about the beam 15. The above t structure has been `ful-ly. describedv and claimedpin a copending application .previous- Y ,igor-1y mensaje fr 'Y lThe turntablefV 14 .hasa vtooth segment 2O rigidly affixed'V thereto. See Fig 31 A cross I .bar 21 is slotted. and adjustablyconnected to thezmembers 12, as indicated at v22, rand prime n 25..,movers or motors 23 and 24 are fastened unf derneath of. the bar and supporta housing .25 therebetween..V f f .L Therhous'ing 25 has: al cover Amember 26 andthe .motory shaft-27, this motor shaft'belm ing 'common to both fmotors, passesy through voppositesides ofthev housing. worm 28 .is rigidly mountedon the shaft27 interiorly V ofthe housing.` A stub shat/.29is vertically mounted-in the housing'and a worm wheel 3.0'V l aisrigidly attached `thereto. and vengageswith tthe ,worm 28.' 1 A pinion 31,vsee.;li`ig .5, enf` gages with: kthe toothed segmenti, of the turn- Vtable. 14` and thusrotation of either motor will cause movement of the turntable.

4() f Thecross bar 21 serveslto'support theele# ,mentsgor'arms 35and 36 of the circuit breakver,;these` arms beingpivoted as indicated at 37- and 38, respectively-:A Yspring 39 is stretched between=-the vrear portions of. the

. '45 arms and serves to maintain the same Vagainst Vthe contact points40 ancl,41. `These contact :points are mounted Yupon Vthe stationary ,block 42 respectively connect to the wires 50 and, 51, these hWires leading to any' Vsuitable sopcontrol mech'anismY such as the doiibl'e'throw Y 1 rswitch 52 and power is supplied by the storage battery 53, this battery preferablynbeing fthe oneused inthe trucki'v Electrical conduc-V tors i and f61leadV fromf the Y rearfportions v55 offsthe 'arms 36 35',frespectivel`y, and energizetheir respective motors." Motors 23 fand'24 lare grounded' asindicated at vand 64, respectively.v A s' A Y v The turntable 14'harsfmembersi 65 and 66 e0 ezrtendingthereacross Vtheseme'mbers are adapted tocontact with the arms 35 andYV 36, respectively, whenever the .turntable'Y-has been rotatedits maximum -in eitherfdirec'tion. Q

The operation is easily understood.. `W'hen- :717.95 ever the driver othey truck, who' fisalsofthe Vmanipulator of the scraping mechanism dei When the proper position of the blade has been reached, the operator releases or turns the double throw switch to its neutral position, i

as shown inF ig. :1,fa'nd the blade is locked in its adjusted positionvdue to the usual locking action of the worm withits worm wheel.

If theswitch 52 should be linadvertently operated firstthe turntable has rotated to a .pointl whereV the beamk and theblade .might contact with the rear wheels, the safety mechanism-is brought into operation. rhissaiety mechanism, Aactuated bythe members 65 and 66, abuts against. the inner yendsof'the members 35 and `36, respectively,and thus separate the respective arm'from its adjacent contact to thereby break the electric circuit and cause the operationY ofA the motor to cease.

vIt Vwill be noted that the motor 23operates l in such a direction yas to cause the turntable to Yrotate in` a counterclockwise direction with v'reference to Fig. l. In this case shouldthe rotation be'too far, the member 65 willl engage the arm35 and-thus stop' theoperation lof themotor 23. However, the doublethrow switch 52 mayjnow be thrown-to its other' position and current, will 'iowvthrough the other side on'V the ,arm 36 and thus the turntable may be` brought back towards its original position. As soon-as itstarts'iinthis .direction the spring 39j causes the arm 35 to again engage its contact 41.5/

'F rom the above description itQwill be appreciated that I .have invented an extremely practicalvand'sturdy adjusting unit which may be easily and expediently applied to the 'particular type of road 'scraping mechanism herein ,involved and also which has a safety deviceV which limits the movement of the beam and vits scraping blade.

Having 4 thus Vrevealed this invention, I j

claimas new and desire tose'c'urethe ollow- V i ing combinations and elements-or equivalents thereof, by Letters Patent-ofthe United States. i Y r Y vIclaim: -ff j. j

1. A roadvscraper -ofgthevclraracter described comprising -a'V frame; a-turntableV mounted thereon, across barmounted adj acent the turn table,alined Vniotorsmounted upon the l'cross bar, .a housing intermediate kthe motors, said mot-orsgjhaVing a common shaft eXtending throughfsaid .housing; a

. worm-onesaid shaft ,interiorly`-o the housing, i aV worm' .vwheelymorunted upony the last inenf tioned shaft and meshing with the worm, a pinion mounted on the last mentionad shaft outside ofthe housing, a'segment fixedV concentrically to the turntable and toothed soy as to mesh with the said pinion, and means for alternately operating the motors in oppo-` site directions whereby the turntable,A may be operated in different directions. 2. A road scraper as set forth in claim 1 kin which the operatinglmeans for the motors has a circuit breaker, and means on the turnf table adapted to contact withjthe circuit f said shaft, a worm wheel driven by the worm,-

gearing between the worm wheel and thel breaker upon a limited movement of the turn- A 1`5 table whereby the operating means is rendered ineffective.

3. A road scraper comprising a turntable mounted thereon, a cross bar on said frame located adjacent the turntable,Y

two alined motors havingpa common shaft mounted upon the cross bar, arworm upon turntable whereby the'latter is driven, and

means to alternately energize the motors whereby the turntable is driven in the chosen direction.

4f A road scraper as set forth in 'claim 3 in,

which means is mounted on the turntable to bar, a common sha1 lrender the venergizing' meansinoperative atV certain predetermined points of movement of the turntable. Y

@5. Aroad scraping apparatus having aV frame, a turntable mounted thereon, two

alined motors mounted upon the Vframe and adjacent Vthe'turntable, said motors being adapted to rotatein opposite directions when; energized, and gearing between the-motorsl and the turntable whereby the latter is actu-fV ated.

supplying the motors with electrical ,energyV and additional means are mounted upon the turntable, said latter means being adapted to render the former means inoperative upon a predetermined movement of the turntable. 7. A road scraper as recited in claim 5in which the motors have a common shaft.

8. In combination with a roadv scraper, a

turntable mounted thereon, a crossbar adj a'- cent the turntable, two-motors upon the cross J:t for said motors, control means for operating'the motors` independentlyjgearing between the'motor shaft and the turntable and means on the turntableV Y adapted to contact with' the control means ,whereby the control means isrenderedinop-l erative.

9. In combination, a turntable, a support adjacent lthe turntable, two .prime movers" mounted on said support, and common means L between the prime, movers and the turntable whereby operation of one prime mover *willV causerotation of the turntable in one Vdirection and Y,operationA of the other prime 4mover frame, a

f and operate the circuitbreaker `6, 'A road scrapingapparatusvas setforth in claim 5 in which means are utilizedvi'o'r;`

will cause rotation of other direction.

the ,turn` table inthe y' 10.V A combination of elementsas recited in i claim 9 vand also having means on kthe turntableV toi render the prime moversy inopf erative whenthe turntable has rotated a pre-,

` determined distance.

. 11. Incombination, a' turntable, a toothed Vsegment rigid therewith,` a support adjacent l `the turntable, two Valined motors upon sa'idfk75" support, said motors having a common shaft, v5

"and gea-.ringbetween the aforesaid shaft and the toothed segment whereby the turntable is rotated. y l y n 12. A device of the class described inclaim ed upon the turntable adapted to contact with l I j `whereby the motors arerendered inoperative. f

13.. Incombinationwithlaroad scraper,a' 'i turntable mounted thereon, a toothed seg- Vment Amountedl upon the turntable, adjustable supporting meansradj acenttheturntable,`

ment` andthe pinion is varied.

14. Incombin'ation, a turntable, `a support adjacent thereto,twogopposed motors upon said support, and .common gearing between* 1l but further characterized by the fact that y afcircuit `breaker is in the circuitenergizing thealined motors and that means are mount-f :[00v the opposedmotors and theturntable where-vV y j Vby the turntable is drivenin either direction.

- 15. In combinatiomturntablepa cross bar, u

two prime movers supported upon saidicross bar, and` means between the prime movers and movers turns the turntable. V .A

V16.",Alroad scraper'. comprising Va turntable] i' having atoothed' portion fothereon, alined motors adjacent the turntable, means for in` dividually controllingvthe motors, Vand gear' -thelturntable whereby actuationof the" prime j l ing betweengthefopposed ends ofthe motors and ythe toothedy portion of vthe turntable;-

whereby the turntablemay be driven.

on, alined`motors adjacentthe frame, 'said motors'fhaving a common shaft, a worm on i saidshaftjand Y gearing betweensaid worm -Y and said turntable wherebythe turntable'is driven.` f y i Intestimony whereof I affix my signature.

, .GEORGEn;I DEAN.

iso; c

17. AV devicey of retenes, described' coni! 111.55'

'prisingj a frame, a turntablefmounted there.-v 

